Special Features: Designed for sensitive electronics. The SAVE program has been designed for SAFE fully automatic low volt start (from 0.5 Volts) and PULSE recovery of deep discharged batteries connected to very sensitive electronics e.g. light aircraft, industrial equipment. Protection against incorrect voltage selection. With 24V selected and a 12V battery is connected OptiMate 6 12V-24V will immediately warn that a low voltage is sensed and then not proceed to charging. USER must confirm the nominal voltage of the connected battery is 24V before SAVE mode activates.